sudo dmraid -ay -dddd -vvvv gives: WARN: locking /var/lock/dmraid/.lock NOTICE: /dev/sdd: asr discovering NOTICE: /dev/sdd: ddf1 discovering NOTICE: /dev/sdd: hpt37x discovering NOTICE: /dev/sdd: hpt45x discovering NOTICE: /dev/sdd: isw discovering DEBUG: not isw at 1000204884992 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 1000203803136 NOTICE: /dev/sdd: jmicron discovering NOTICE: /dev/sdd: lsi discovering NOTICE: /dev/sdd: nvidia discovering NOTICE: /dev/sdd: pdc discovering DEBUG: checking pdc metadata at 1000204853760 DEBUG: checking pdc metadata at 1000204860928 NOTICE: /dev/sdd: pdc metadata discovered NOTICE: /dev/sdd: sil discovering NOTICE: /dev/sdd: via discovering NOTICE: /dev/sdc: asr discovering NOTICE: /dev/sdc: ddf1 discovering NOTICE: /dev/sdc: hpt37x discovering NOTICE: /dev/sdc: hpt45x discovering NOTICE: /dev/sdc: isw discovering DEBUG: not isw at 64023256064 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 64022174208 NOTICE: /dev/sdc: jmicron discovering NOTICE: /dev/sdc: lsi discovering NOTICE: /dev/sdc: nvidia discovering NOTICE: /dev/sdc: pdc discovering DEBUG: checking pdc metadata at 64023224832 DEBUG: checking pdc metadata at 64023126528 DEBUG: checking pdc metadata at 64023126016 DEBUG: checking pdc metadata at 64023248896 DEBUG: checking pdc metadata at 64023052800 DEBUG: checking pdc metadata at 64022954496 DEBUG: checking pdc metadata at 64022911488 DEBUG: checking pdc metadata at 64022880768 DEBUG: checking pdc metadata at 64022758400 DEBUG: checking pdc metadata at 64022749696 DEBUG: checking pdc metadata at 64022790656 DEBUG: checking pdc metadata at 64022770176 NOTICE: /dev/sdc: sil discovering NOTICE: /dev/sdc: via discovering NOTICE: /dev/sdb: asr discovering NOTICE: /dev/sdb: ddf1 discovering NOTICE: /dev/sdb: hpt37x discovering NOTICE: /dev/sdb: hpt45x discovering NOTICE: /dev/sdb: isw discovering DEBUG: not isw at 64023256064 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 64022174208 NOTICE: /dev/sdb: jmicron discovering NOTICE: /dev/sdb: lsi discovering NOTICE: /dev/sdb: nvidia discovering NOTICE: /dev/sdb: pdc discovering DEBUG: checking pdc metadata at 64023224832 DEBUG: checking pdc metadata at 64023126528 DEBUG: checking pdc metadata at 64023126016 DEBUG: checking pdc metadata at 64023248896 DEBUG: checking pdc metadata at 64023052800 DEBUG: checking pdc metadata at 64022954496 DEBUG: checking pdc metadata at 64022911488 DEBUG: checking pdc metadata at 64022880768 DEBUG: checking pdc metadata at 64022758400 DEBUG: checking pdc metadata at 64022749696 DEBUG: checking pdc metadata at 64022790656 DEBUG: checking pdc metadata at 64022770176 NOTICE: /dev/sdb: sil discovering NOTICE: /dev/sdb: via discovering NOTICE: /dev/sda: asr discovering NOTICE: /dev/sda: ddf1 discovering NOTICE: /dev/sda: hpt37x discovering NOTICE: /dev/sda: hpt45x discovering NOTICE: /dev/sda: isw discovering DEBUG: not isw at 1000204884992 DEBUG: isw trying hard coded -2115 offset. DEBUG: not isw at 1000203803136 NOTICE: /dev/sda: jmicron discovering NOTICE: /dev/sda: lsi discovering NOTICE: /dev/sda: nvidia discovering NOTICE: /dev/sda: pdc discovering DEBUG: checking pdc metadata at 1000204853760 DEBUG: checking pdc metadata at 1000204860928 NOTICE: /dev/sda: pdc metadata discovered NOTICE: /dev/sda: sil discovering NOTICE: /dev/sda: via discovering DEBUG: _find_set: searching pdc_gjgbcdghd DEBUG: _find_set: not found pdc_gjgbcdghd DEBUG: _find_set: searching pdc_gjgbcdghd DEBUG: _find_set: not found pdc_gjgbcdghd NOTICE: added /dev/sdd to RAID set "pdc_gjgbcdghd" DEBUG: _find_set: searching pdc_gjgbcdghd DEBUG: _find_set: found pdc_gjgbcdghd DEBUG: _find_set: searching pdc_gjgbcdghd DEBUG: _find_set: found pdc_gjgbcdghd NOTICE: added /dev/sda to RAID set "pdc_gjgbcdghd" DEBUG: checking pdc device "/dev/sdd" DEBUG: checking pdc device "/dev/sda" DEBUG: set status of set "pdc_gjgbcdghd" to 16 DEBUG: checking pdc device "/dev/sdd" DEBUG: checking pdc device "/dev/sda" DEBUG: set status of set "pdc_gjgbcdghd" to 16 RAID set "pdc_gjgbcdghd" was not activated WARN: unlocking /var/lock/dmraid/.lock DEBUG: freeing devices of RAID set "pdc_gjgbcdghd" DEBUG: freeing device "pdc_gjgbcdghd", path "/dev/sdd" DEBUG: freeing device "pdc_gjgbcdghd", path "/dev/sda" and sudo fdisk -lu gives: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00056c51 Device Boot Start End Blocks Id System /dev/sda1 63 1953118439 976559188+ 7 HPFS/NTFS Disk /dev/sdb: 64.0 GB, 64023257088 bytes 255 heads, 63 sectors/track, 7783 cylinders, total 125045424 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004d8d4 Device Boot Start End Blocks Id System /dev/sdb1 * 2048 119851007 59924480 83 Linux /dev/sdb2 119853054 125044735 2595841 5 Extended /dev/sdb5 119853056 125044735 2595840 82 Linux swap / Solaris Disk /dev/sdc: 64.0 GB, 64023257088 bytes 255 heads, 63 sectors/track, 7783 cylinders, total 125045424 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x53245375 Device Boot Start End Blocks Id System /dev/sdc1 * 2048 125042687 62520320 7 HPFS/NTFS Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00056c51 Device Boot Start End Blocks Id System /dev/sdd1 63 1953118439 976559188+ 7 HPFS/NTFS